Airline Safeties
05-20-2008, 08:47 AM
#1
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Airline Safeties
I thought I saw a post about the plastic, reusable, airline safeties, but it's gone.
I've built jets using safety wire to insure airline fittings wouldn't leak. It was frustrating when you had to redo something because it seems I always found some way to draw blood from one of my fingers. At any rate, I got some of these plastic airline safeties from Jets N Stuff, and I will never go back to safety wire. These little devices slide over the airline onto the airline fitting and I've never had a leak in the last 4 jets I've used them on. Plus, if you have to disconnect the airline for some reason, just slide the little plastic device back, disconnect your airline, and when your ready to reattach it, the airline safety will again, do the job.
If you're like me and want to do everything possible to avoid problems at the field or in the air, give them a try.
I've built jets using safety wire to insure airline fittings wouldn't leak. It was frustrating when you had to redo something because it seems I always found some way to draw blood from one of my fingers. At any rate, I got some of these plastic airline safeties from Jets N Stuff, and I will never go back to safety wire. These little devices slide over the airline onto the airline fitting and I've never had a leak in the last 4 jets I've used them on. Plus, if you have to disconnect the airline for some reason, just slide the little plastic device back, disconnect your airline, and when your ready to reattach it, the airline safety will again, do the job.
If you're like me and want to do everything possible to avoid problems at the field or in the air, give them a try.
05-20-2008, 11:20 AM
#4
RE: Airline Safeties
Yup, Sandor, you could do that.................Except that the outside diameter of the air line is .125" and 4mm is .1574".... it would be a loose fit. Or, you could cut a bunch of 1/8" I.D. Tygon® tubing to length.....Except it is quite "stretchy" and it does not provide much assistance in securing the air line which is less likely to stretch than the fuel tubing itself. The material that the Safeties are made out of has an Inside diameter of .127...just right to snugly slide over the tube. When the line is pushed over a barbed fitting, it expands and the Safeties have just the right amount of "give" to stretch over the air line. They have a thicker wall thickness than "normal tubing of a similar size....I'm not certain as to what material they are made from. What else can I say? They work well and can be re-used.
I built one of my first R/C systems from a kit....I re-built and re-tuned it myself on nearly a weekly basis.[
] I built my own U.A.T. on my first jet. Sometimes, it just feels better to pull a part off the self and use it knowing that it works correctly and that is why we are offering the Air Line Safeties. We have used these 6 or 7 jets so far and they work well....Even in the desert heat.
Tailwinds,
John
I built one of my first R/C systems from a kit....I re-built and re-tuned it myself on nearly a weekly basis.[
] I built my own U.A.T. on my first jet. Sometimes, it just feels better to pull a part off the self and use it knowing that it works correctly and that is why we are offering the Air Line Safeties. We have used these 6 or 7 jets so far and they work well....Even in the desert heat.Tailwinds,
John
05-20-2008, 11:53 AM
#6
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RE: Airline Safeties
ORIGINAL: cactusflyer
Yup, Sandor, you could do that.................Except that the outside diameter of the air line is .125" and 4mm is .1574".... it would be a loose fit. Or, you could cut a bunch of 1/8" I.D. Tygon® tubing to length.....Except it is quite "stretchy" and it does not provide much assistance in securing the air line which is less likely to stretch than the fuel tubing itself. The material that the Safeties are made out of has an Inside diameter of .127...just right to snugly slide over the tube. When the line is pushed over a barbed fitting, it expands and the Safeties have just the right amount of "give" to stretch over the air line. They have a thicker wall thickness than "normal tubing of a similar size....I'm not certain as to what material they are made from.
Yup, Sandor, you could do that.................Except that the outside diameter of the air line is .125" and 4mm is .1574".... it would be a loose fit. Or, you could cut a bunch of 1/8" I.D. Tygon® tubing to length.....Except it is quite "stretchy" and it does not provide much assistance in securing the air line which is less likely to stretch than the fuel tubing itself. The material that the Safeties are made out of has an Inside diameter of .127...just right to snugly slide over the tube. When the line is pushed over a barbed fitting, it expands and the Safeties have just the right amount of "give" to stretch over the air line. They have a thicker wall thickness than "normal tubing of a similar size....I'm not certain as to what material they are made from.
05-20-2008, 12:03 PM
#7
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RE: Airline Safeties
Can I offer an easier solution to the problem. Take some regular airline and snip off a piece about 1/8" long. Put it over a pair of small needle nose pliers and stretch just enough to get it over the end of your air tubing. work it down the air tubing about 3/8" and put the main tubing on your brass air nipple. then work the small piece of airline back up over the nipple. What you now have is a fitting that is very hard to get off and is pretty much airtight. It takes a little time to do it but once you do a few times you get the hang of it and can move quite quickly through an installation. I have done it this way now for quite some time and have not had one fail me yet. The upside to it is you can make the small pieces out of a piece of airline that might be too short to go anywhere else, thus saving you money. A 3 inch piece will make enough to do a complete airplane.
Patrick
Patrick
05-20-2008, 12:41 PM
#8
RE: Airline Safeties
Gordon,
The Safeties are for 1/16" I.D. air line. They are installed in the same manner as suggested by Patrick except there is a lot less of the "work". I have found that they work well with the brass barbed fittings that we offer as well as the fittings on Tams' landing gear, Robart gear, valves and plastic t-fittings etc. Once the tubing is on the barb, you slide the Safeties up onto the the barb as well. Works well......lasts a long time!
Guys, I don't claim that the Air Line Safeties are the only working solution, they are just the most convenient way to tackle the problem......no cutting, stretching, "working"....................IMHO.
Tailwinds,
John
The Safeties are for 1/16" I.D. air line. They are installed in the same manner as suggested by Patrick except there is a lot less of the "work". I have found that they work well with the brass barbed fittings that we offer as well as the fittings on Tams' landing gear, Robart gear, valves and plastic t-fittings etc. Once the tubing is on the barb, you slide the Safeties up onto the the barb as well. Works well......lasts a long time!
Guys, I don't claim that the Air Line Safeties are the only working solution, they are just the most convenient way to tackle the problem......no cutting, stretching, "working"....................IMHO.
Tailwinds,
John
